diff --git a/pyext/GData.i b/pyext/GData.i
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+++ b/pyext/GData.i
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+/***************************************************************************
+ *                   GData.i  -  Data class SWIG interface                 *
+ * ----------------------------------------------------------------------- *
+ *  copyright            : (C) 2008 by Jurgen Knodlseder                   *
+ * ----------------------------------------------------------------------- *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+/**
+ * @file GData.i
+ * @brief GData class SWIG file.
+ * @author J. Knodlseder
+ */
+%{
+/* Put headers and other declarations here that are needed for compilation */
+#include "GData.hpp"
+%}
+
+
+/***********************************************************************//**
+ * @class GData
+ *
+ * @brief Interface for the data class.
+ ***************************************************************************/
+class GData {
+public:
+    // Constructors and destructors
+    GData();
+    GData(const GData& data);
+    virtual ~GData();
+
+    // Methods
+};